3 years ago

X^3-x^2=30 what are both x's

Mathematics

1 answer:

Mnenie [13.5K]3 years ago

8 0

Step-by-step explanation:

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D, the multiplication results in 1.125

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3 years ago

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- 1 2/3 + (-2 1/6)

Marizza181 [45]

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HELP PLEASE!!! Maia walks 12 miles. Then she walks 1/4 of that distance. select ALL of the expressions that represent the total

posledela

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Step-by-step explanation:

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3 years ago

Suppose that we will randomly select a sample of 106 measurements from a population having a mean equal to 19 and a standard dev

svet-max [94.6K]

Answer:

$z =\frac{18.45-19}{\frac{7}{\sqrt{106}}}= -0.809$

And if we use the normal standard distribution or excel we got:

$P(z$

Step-by-step explanation:

For this case we have the following info given:

$\mu = 19$ represent the mean

$\sigma = 7$ represent the standard deviation

$n = 106$ represent the sample size

The distribution for the sample size if we use the central limit theorem (n>30) is given by:

$\bar X \sim N(\mu , \frac{\sigma}{\sqrt{n}})$

And for this case we want to find the following probability:

$P(\bar X< 18.45)$

And for this case we can use the z score formula given by:

$z =\frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And replacing we got:

$z =\frac{18.45-19}{\frac{7}{\sqrt{106}}}= -0.809$

And if we use the normal standard distribution or excel we got:

$P(z$

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3 years ago

Standard form of 40+2+.3+.08

yan [13]

$40 + 2 = 42 \\ .3 + .08 = .38 \\ .38 + 42 = 42.38$

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3 years ago

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